Tamsen and vera imagine visiting another planet, planet x, whose gravitational acceleration, gx, is different from that of earth's. they envision a pendulum, whose period on earth is 2.243 s, that is set in motion on planet x, and the period is measured to be 1.510 s. what is the ratio of gx/gearth? neglect any effects caused by air resistance. (gx/ge= if the average density of planet x is equal to earthes average density, pe, what is the ratio of rx/re, where re is the mean radius of earth? (assume both planets are spherical. recall that p= m/v and vsphere= 4/3 pi r^3.) (rx/re= ? )